^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * arch/arm64/kernel/sys32.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2015 ARM Ltd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * Needed to avoid conflicting __NR_* macros between uapi/asm/unistd.h and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * asm/unistd32.h.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #define __COMPAT_SYSCALL_NR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/compat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/compiler.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/syscalls.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <asm/syscall.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) asmlinkage long compat_sys_sigreturn(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) asmlinkage long compat_sys_rt_sigreturn(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) COMPAT_SYSCALL_DEFINE3(aarch32_statfs64, const char __user *, pathname,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) compat_size_t, sz, struct compat_statfs64 __user *, buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) * 32-bit ARM applies an OABI compatibility fixup to statfs64 and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) * fstatfs64 regardless of whether OABI is in use, and therefore
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) * arbitrary binaries may rely upon it, so we must do the same.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) * For more details, see commit:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) * 713c481519f19df9 ("[ARM] 3108/2: old ABI compat: statfs64 and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) * fstatfs64")
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) if (sz == 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) sz = 84;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) return kcompat_sys_statfs64(pathname, sz, buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) COMPAT_SYSCALL_DEFINE3(aarch32_fstatfs64, unsigned int, fd, compat_size_t, sz,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) struct compat_statfs64 __user *, buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) /* see aarch32_statfs64 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) if (sz == 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) sz = 84;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) return kcompat_sys_fstatfs64(fd, sz, buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) * Note: off_4k is always in units of 4K. If we can't do the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) * requested offset because it is not page-aligned, we return -EINVAL.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) COMPAT_SYSCALL_DEFINE6(aarch32_mmap2, unsigned long, addr, unsigned long, len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) unsigned long, prot, unsigned long, flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) unsigned long, fd, unsigned long, off_4k)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) if (off_4k & (~PAGE_MASK >> 12))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) off_4k >>= (PAGE_SHIFT - 12);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) return ksys_mmap_pgoff(addr, len, prot, flags, fd, off_4k);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) #ifdef CONFIG_CPU_BIG_ENDIAN
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) #define arg_u32p(name) u32, name##_hi, u32, name##_lo
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) #define arg_u32p(name) u32, name##_lo, u32, name##_hi
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) #define arg_u64(name) (((u64)name##_hi << 32) | name##_lo)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) COMPAT_SYSCALL_DEFINE6(aarch32_pread64, unsigned int, fd, char __user *, buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) size_t, count, u32, __pad, arg_u32p(pos))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) return ksys_pread64(fd, buf, count, arg_u64(pos));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) COMPAT_SYSCALL_DEFINE6(aarch32_pwrite64, unsigned int, fd,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) const char __user *, buf, size_t, count, u32, __pad,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) arg_u32p(pos))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) return ksys_pwrite64(fd, buf, count, arg_u64(pos));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) COMPAT_SYSCALL_DEFINE4(aarch32_truncate64, const char __user *, pathname,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) u32, __pad, arg_u32p(length))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) return ksys_truncate(pathname, arg_u64(length));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) COMPAT_SYSCALL_DEFINE4(aarch32_ftruncate64, unsigned int, fd, u32, __pad,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) arg_u32p(length))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) return ksys_ftruncate(fd, arg_u64(length));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) COMPAT_SYSCALL_DEFINE5(aarch32_readahead, int, fd, u32, __pad,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) arg_u32p(offset), size_t, count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) return ksys_readahead(fd, arg_u64(offset), count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) COMPAT_SYSCALL_DEFINE6(aarch32_fadvise64_64, int, fd, int, advice,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) arg_u32p(offset), arg_u32p(len))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) return ksys_fadvise64_64(fd, arg_u64(offset), arg_u64(len), advice);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) COMPAT_SYSCALL_DEFINE6(aarch32_sync_file_range2, int, fd, unsigned int, flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) arg_u32p(offset), arg_u32p(nbytes))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) return ksys_sync_file_range(fd, arg_u64(offset), arg_u64(nbytes),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) COMPAT_SYSCALL_DEFINE6(aarch32_fallocate, int, fd, int, mode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) arg_u32p(offset), arg_u32p(len))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) return ksys_fallocate(fd, mode, arg_u64(offset), arg_u64(len));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) #undef __SYSCALL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) #define __SYSCALL(nr, sym) asmlinkage long __arm64_##sym(const struct pt_regs *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) #include <asm/unistd32.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) #undef __SYSCALL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) #define __SYSCALL(nr, sym) [nr] = __arm64_##sym,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) const syscall_fn_t compat_sys_call_table[__NR_compat_syscalls] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) [0 ... __NR_compat_syscalls - 1] = __arm64_sys_ni_syscall,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) #include <asm/unistd32.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) };
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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